1 files changed, 1 insertions, 1 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 56623a75f74..f2a3ac92132 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -1890,7 +1890,7 @@ struct Lisp_Sub_Char_Table
 
     /* Use set_sub_char_table_contents to set this.  */
     Lisp_Object contents[FLEXIBLE_ARRAY_MEMBER];
-  };
+  } GCALIGNED_STRUCT;
 
 INLINE bool
 SUB_CHAR_TABLE_P (Lisp_Object a)